Nortel VoIP Gateway, Configuration Manual, Page: 31 / 220

Configuring the Protocol Definition parameters 31
Norstar VoIP Gateway Configuration Guide
Q.931 Multiplexing Select No to disable H.323 Q.931 multiplexing.
Select Yes to enable H.323 Q.931 multiplexing.
The default value is No.
When you enable Q.931 multiplexing, the VoIP Gateway uses the same socket for all
H.225 messages sent to the same destination.
Gatekeeper
Working with Gatekeeper Select Yes if you are using a Gatekeeper to determine what IP address should be used
for the telephone number dialed.
Select No if you are not using a Gatekeeper to resolve telephone number to IP address
translation. If you are not using a Gatekeeper, you must configure the Telephone to IP
Routing table on the VoIP Gateway.
Gatekeeper IP address Enter the IP address of the Gatekeeper you are using.
Enter the IP address in dotted format notation, for example 192.10.1.255.
Gatekeeper ID Enter the string used to identify the Gatekeeper.
Gatekeeper Redundancy Select No if you are using a single Gatekeeper.
Select Yes if you are using two or three Gatekeepers.
If you enable Gatekeeper Redundancy, the VoIP Gateway can work with multiple
Gatekeepers. If there is no response from the current Gatekeeper, the VoIP Gateway tries
to communicate with the other Gatekeepers. When a new Gatekeeper is found, the VoIP
Gateway continues working with it until the next failure.
To use Gatekeeper Redundancy, you must enter an IP address in the First Redundant
Gatekeeper box. If you are using three Gatekeepers, you also need to enter an IP
address in the Second Redundant Gatekeeper box.
First Redundant
Gatekeeper Enter the IP address of the first redundant Gatekeeper you are using.
Enter the IP address in dotted format notation, for example 192.10.1.255.
Note: This parameter is available only if you select Yes in the Gatekeeper Redundancy
box.
Second Redundant
Gatekeeper Enter the IP address of the second redundant Gatekeeper you are using.
Enter the IP address in dotted format notation, for example 192.10.1.255.
Note: This parameter is available only if you select Yes in the Gatekeeper Redundancy
box.
Fallback to internal
routing Select No if you do not want to use the internal Telephone to IP Routing table when the
Gatekeeper is not available.
Select Yes if you want to use the internal Telephone to IP Routing table when the
Gatekeeper is not available.
When the VoIP Gateway falls back to the internal Telephone to IP Routing table, the VoIP
Gateway continues scanning for the Gatekeeper. When the VoIP Gateway finds an active
Gatekeeper, it switches from internal routing back to Gatekeeper routing.
The default value is No.
Table 4 Protocol Definition parameters (Continued)
Parameter Description